While many products perform an efficient job of checking for "on premise" telephone recording devices, the patented Comsec C3i-II is the only unit designed specifically for detection of central station or "down line" taps. Line powered and easy to use, the Comsec C3i-II's rugged heavy duty metal case and long life LED assures years of product life. Comes with complete instructions and molded polyurethane carry case. Note: This product alerts user to "down line" taps only. For complete protection we recommend the use of the SL-100 Telephone Analyzer (see below and combo offer) or similar device in conjunction with the Comsec C3i-II.
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